Table 9.

Size (mean, median and range in millimeters) and rank of lesions undetected by US, Mx and re-reviewed mammograms

Lesion rank	Undetected by US	Undetected by Mx	Undetected by re-Rev Mx
Index lesion	23.8	15.8	14.7
	15	11.5	11
	2 – 70	3 – 52	3 – 52
2nd	8.8	8.4	8.4
	6	6	6.4
	0.1 – 39	0.1 – 39	0.1 – 39
3rd	6.6	6.6	6.1
	5	5	4.5
	0.1 – 20	0.1 – 20	0.1 – 20
4th	6.2	6.8	6.8
	4	4	4
	0.2 – 39	0.1 – 39	0.1 – 39
≥ 5th	6.3	5.7	5.7
	3	2.5	2.5
	0.1 – 25	0.1 – 25	0.1 – 25